bpo-30329: Catch Windows error 10022 on shutdown() (#1538) (#1620)
Catch the Windows socket WSAEINVAL error (code 10022) in imaplib and
poplib on shutdown(SHUT_RDWR): An invalid operation was attempted
This error occurs sometimes on SSL connections.
(cherry picked from commit 83a2c2879839da2e10037f5e4af1bd1dafbf1a52)
diff --git a/Lib/poplib.py b/Lib/poplib.py
index cae6950..6bcfa5c 100644
--- a/Lib/poplib.py
+++ b/Lib/poplib.py
@@ -288,9 +288,12 @@
if sock is not None:
try:
sock.shutdown(socket.SHUT_RDWR)
- except OSError as e:
- # The server might already have closed the connection
- if e.errno != errno.ENOTCONN:
+ except OSError as exc:
+ # The server might already have closed the connection.
+ # On Windows, this may result in WSAEINVAL (error 10022):
+ # An invalid operation was attempted.
+ if (exc.errno != errno.ENOTCONN
+ and getattr(exc, 'winerror', 0) != 10022):
raise
finally:
sock.close()